Twister traveler and method of making same



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p 927 P. G. WENTWORTH TWISTER TRAVELER AND METHOD OF MAKING SAME FiledAug. 26. 1926 Patented Sept.--13, 1927.

OFFICE.

PHJLIP WENTWORTH, OF PROVIDENCE, RHODE ISIIJAND- 'rwrs'rnn' 'mavnnnn.AND mnrnon or MAKING same.

Application filed August 26, 1926. Serial No. 181,667.

In previous patents I have dealt with the problems of lubrication anddurability 1n travelers and refer to Nos. 1,415,072 and- 1,461,059 asexamples of each. 6 My present invention involves bot h factors andspecifically involves certain improvements over the former in which alubricating channel was formed to catch and dellver the grease.

As therein shown, the groove was a channel cut in the inner face of thetraveler which was of the twister type. While these travelers haveproved to be highly satlsfactory in operation, they were somewhatdifiiciilt and expensive to make. Furthermore, they had a tendencycommon to travelers of the twister type to break at their upper bend,which is. usually a rather abrupt turn. The difiiculty has been pro- 2 0vide metal pliant enough to take this bend and yet of sufiicientrigidity to stand the strains of usage.

Pursuant to my present inven-tlon, I provide a traveler of'stock capableof being bent' as desired, withoutfracture and yet a when formed.according to my method,

having a very considerable strength or stlfiness.

I will proceed to describe my invention and will refer to theaccompanying drawings in which I have shown a characteristlc embodiment.

In the drawings:

'Fig. 1 is a, view of such a traveler on its ring.

.Fig. 2 is a diagrammatic view of the method of manufacture.

Fig. 3 a vertical section. I

- Fig. 4 an inside face view, and Fig. 5 a section on the line 5-5 ofFig. ,4.

In the embodiment shown in the draw-a ings, the traveler T is of theusual type and adapted to run on the conventional ring R as shown inFig. 1. While traveler T is 'of general formas shown, it has alubricatlng groove after the manner of my invention in my previousPatent 1,415,072 as before explained. According to my present invention,the groove G instead of being a slot or cutroovef is in the nature ofthe blank with its ollo'w. side inward toafiord a groove, and

its raised side outward forming a longitudmal rim which strengthens thetraveler.

The problem in this type of traveler is somewhat similar to thatinvolved in my prior Patent 1,461,059. The twister traveler, however, isa heavier traveler and is formed of difl'erent stock .which is usuallyan alloy comprising generally a composition compounded to a certainanalysis from brass,

cgpper, zinc, and tin. p

The critical point in this type of traveler is at the bend t where thestockis turned at substantially right angles to itself, and where thestrain, incident to placing the traveler on the ring R, localizes insuch a way as to be apt to cause breakage at this point, For thisreason, the alloy of this traveler has had to be somewhat soft eventhough this softness was undesirable in the body of the traveler. Inaccordance with my invention, I take my stock preferably in rod form asindicated at S in Fig. 2. This stock is passed through rolls A whichflatten'it to the desired cross section. A stop is then made by the diesB to produce the rib G at suitable intervals. The stock is then severedin proper length as indicated at S in Fig. 2, and is then formed intothe traveler T as therein indicated. 1

This provides a traveler which has a surface hardness imparted by therolling and yet of sufiicient softness to rmit the bend at t and toallow the trave er to harden at that point without breakage. The bodyof'the traveler is, however, given great rigidity by means of theimpressed groove or channel G.

In the formation of this channel, there is not only the rigidity due tothe stiffening effect of the rib as such, but also a further hardeningeffect due to the work of the metal in the die. The groove G has thesameformation asthe groove or slot in my previous patent but the traveler soconstructed and formed has the" additional advantages above recited.

Travelers in accordance with my invention may beef-any shapeor designand formed of any usual material and may be made in any suitable steps.The method diagrammatically illustrated in Fig. 2 is intended merely asan illustration, and the depth, length, and location of the groove andrib, may be modified to meet any requirements or conditions;

All such modifications and variants are, therefore, to be understood ascontemplated by my invention which is formulated in the followingclaims.

I claim 5 1. A traveler of the class described comprising a fiat metalbody having a channel bead formed longitudinally thereof, and disposedwith its channel side on the inner face of the traveler.

2. A traveler of the class described comprising a flat metal body havinga pressed channel bead formed longitudinally thereof, and disposed withits channel side on the inner face of the traveler.

3. In a traveler of the class described, a. longitudinal channel beadhaving its channel on the inner face thereof.

4. In a traveler of the class described, a pressed longitudinal channelbead having its channel on the inner face thereof.

5. The method of forming travelers, consisting in impressing in thestock a channel head with its channel on the inside face of thetraveler.

6. The method of forming travelers, consisting in flattening acylindrical stock, in impressing in the stock spaced channel beads andsevering the stock between beads and in forming therefrom a travelerwith its channel on the inside face. a

In testimony whereof I afiix my signature;

PHILIP C. WENTWORTH.

